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A067477
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Smallest n-digit square starting with 7.
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2
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729, 7056, 70225, 700569, 7001316, 70006689, 700025764, 7000166889, 70000459776, 700001628921, 7000003645504, 70000012293201, 700000047060196, 7000000057996009, 70000000472817424, 700000000779640729
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,1
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FORMULA
| a(n) = ceiling(sqrt(7*10^(n-1)))^2, n>2. - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 18 2002
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PROG
| (PARI) for(n=3, 22, a=ceil(sqrt(7*10^(n-1)))^2; print(a))
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CROSSREFS
| Cf. A035074 (roots), A045790, A067479 (2..9).
Sequence in context: A062556 A017163 A017379 * A034991 A017499 A017631
Adjacent sequences: A067474 A067475 A067476 * A067478 A067479 A067480
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KEYWORD
| base,easy,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 09 2002
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EXTENSIONS
| More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 18 2002
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